I just start a research on perception of speech prosody. At present, the
focus is duration perception. Anybody could recommend me some references
about this topic, in the field of psychoacoustic, music perception or any
other relevant field?

Is there any evidence for integration of interaural time difference
(ITD) information across frequency channels in ITD detection /
discrimination tasks? More specifically, are ITD JNDs lower for a
broadband stimulus compared to any narrowband stimulus within the
spectral range covered by the broadband stimulus?

I must admit that I don't know the psychophysics literature on that, but
from the Physiology point-of-view I would be surprised if there was much
across-frequency-band integration in ITD processing. The reason for this
is that ITDs must be inferred from inter-aural-phase differences as they
are encoded in spike intervals in the auditory nerve, and these are
different in different frequency bands and depend on the cochlear
filtering as much as on the stimulus. Imagine you play a loud click into
the ears. The 100 Hz place of the cochleas might ring in response to
that stimulus at 100Hz, producing short trains of action potentials at
10 ms intervals, while the 250 Hz location might ring at 250 Hz,
producing 4 ms spike interval trains. Except for the first spike, these
spike trains won't "line up", and comparing the 250 Hz band in the left
ear with the 100 Hz band in the right ear cannot give you an unambiguous
answer about the ITD. That's at least how I think about these things
when I ask myself why the medial superior olive, where ITD extraction is
thought to take place, is said to exhibit a very tight tonotopic
organisation. If there was much to be gained by cross-frequency channel
integration, one might expect the MSO not to exhibit such clearly
defined and separated frequency channels. (However, I might be wrong
about all this, so if some other list members do quote some good
psychophysical evidence for cross-frequency integration, then listen to
them and not to me!)

Regards,

Jan

Bernhard Laback wrote:

Dear list,

Is there any evidence for integration of interaural time difference
(ITD) information across frequency channels in ITD detection /
discrimination tasks? More specifically, are ITD JNDs lower for a
broadband stimulus compared to any narrowband stimulus within the
spectral range covered by the broadband stimulus?

Is there any evidence for integration of interaural time difference
(ITD) information across frequency channels in ITD detection /
discrimination tasks? More specifically, are ITD JNDs lower for a
broadband stimulus compared to any narrowband stimulus within the
spectral range covered by the broadband stimulus?

Of course, I assume that the overall intensity is held constant.

I would appreciate any hint,

With best regards,

Bernhard Laback

That is an interesting question. I would recommend the following
papers; Anyone know of any other relevant ones?

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